POSIX compliant termios.h?

Hello!

I have just tried to unBROKEN cad/brlcad and noticed that FreeBSD
termios.h is missing some POSIX mandatory flags. In this case,
TAB3 output processing flag (expand TABs on output == OXTABS).
Are there any plans to fix it in the base?

Attached is the workaround patch for cad/brlcad. Should I push it
into the ports (via PR, etc...) or it is better to wait a little
for a fix in the base?

Thanks,
Alexey.